/Engine/Source/Runtime/Slate/Public/Widgets/Views/STileView.h
Update generate Widgets for Items as needed and clean up any Widgets that are no longer needed. Re-arrange the visible widget order as necessary.
virtual [STableViewBase::FReGenerateResults](API\Runtime\Slate\Widgets\Views\STableViewBase\FReGenerateResults) ReGenerateItems ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & MyGeometry )